Merge pull request #15230 from ilbalance:js_rotate

* in OpenCV.js added 'rotate' function and test sample

* value test added

modules/js/src/embindgen.py

@@ -98,7 +98,7 @@ core = {'': ['absdiff', 'add', 'addWeighted', 'bitwise_and', 'bitwise_not', 'bit
              'compare', 'convertScaleAbs', 'copyMakeBorder', 'countNonZero', 'determinant', 'dft', 'divide', 'eigen', \
              'exp', 'flip', 'getOptimalDFTSize','gemm', 'hconcat', 'inRange', 'invert', 'kmeans', 'log', 'magnitude', \
              'max', 'mean', 'meanStdDev', 'merge', 'min', 'minMaxLoc', 'mixChannels', 'multiply', 'norm', 'normalize', \
-             'perspectiveTransform', 'polarToCart', 'pow', 'randn', 'randu', 'reduce', 'repeat', 'setIdentity', 'setRNGSeed', \
+             'perspectiveTransform', 'polarToCart', 'pow', 'randn', 'randu', 'reduce', 'repeat', 'rotate', 'setIdentity', 'setRNGSeed', \
              'solve', 'solvePoly', 'split', 'sqrt', 'subtract', 'trace', 'transform', 'transpose', 'vconcat'],
         'Algorithm': []}
 

modules/js/test/test_imgproc.js

@@ -941,4 +941,22 @@ QUnit.test('test_filter', function(assert) {
         inv3.delete();
         inv4.delete();
     }
+    //Rotate
+    {
+        let dst = new cv.Mat();
+        let src = cv.matFromArray(3, 2, cv.CV_8U, [1,2,3,4,5,6]);
+
+        cv.rotate(src, dst, cv.ROTATE_90_CLOCKWISE);
+
+        size = dst.size();
+        assert.equal(size.height, 2, "ROTATE_HEIGHT");
+        assert.equal(size.width, 3, "ROTATE_WIGTH");
+
+        let expected = new Uint8Array([5,3,1,6,4,2]);
+
+        assert.deepEqual(dst.data, expected);
+
+        dst.delete();
+        src.delete();
+    }
 });